Found 1367 related files. Current in page 10
Unit 1 Atoms, Molecules and Chemical Arithmetic :- Measurement in chemistry (significant figures, Dimensional analysis). Chemical classification of matter (mixtures, compounds and elements, and purification), Law of chemcial combination and Daiton's Atomic theory, Atomic Mass (mole concept, determination of chemical formulae). Chemical equation (balancing of chemical equation and calculations using chemical equations). Unit 2 Elements, their Occurrence and extraction :- Earth as a source of elements, elements in biology, extraction of metals (metallurgical process, production of concentrated ore, production of metals and their purification). Mineral wealth of India. Qualitative test of metals.
South Korea in the forefront on research and innovation also hosts a UN center. The expo on oceans in Yeosu, South Korea has come to an end. The main objective was to raise people’s awareness on the topic of protecting the marine environment and developing technology concerning the sea. Italy was also present.
La Corea del Sud in prima fila su ricerca e innovazione, ospita anche un centro dell’Onu. Si è chiusa a Yeosu, in Corea del Sud, l’expo sugli oceani. L’obiettivo principale era di sensibilizzare l’opinione pubblica sul tema della salvaguardia dell’ambiente marino e dello sviluppo delle tecnologie riguardanti il mare. Anche l’Italia era presente.
I robot ideati in Scozia lavorano in squadra, come le api, e possono scendere oltre i 200 metri di profondità, al contrario dei sub che adesso svolgono questo compito. Grazie a un database in fase di sviluppo, cercano i frammenti di corallo per rimetterli al loro posto nella barriera.
Q.1 (a) Write down the gravitational unit of force. How is it related to Newton? (b) A water pump raises 50 litres of water through a height of 25 m in 5 s. Calculate the power which the pump supplies. [Take g = 10 Nkg-1 and density of water = 1000kgm-1] (c) Name the three classes of levers and distinguish between them. Give two examples of each. (d) A man weighs 600 N on the earth. What would be his approximate weight on the moon? What is the reason for your answer? (e) Give an example when work done by the force of gravity acting on a body is zero even though the body gets displaced from its initial position. Q.2 (a) If the power of a motor is 40 kW, at what speed can it raise a load of 20,000 N? (b) A ray of light, after refraction through a concave lens emerges parallel to the principal axis.Draw a ray diagram to show the incident ray and its corresponding emergent ray.
Caviar is the most delicious that is loved by all the food lovers. It is one of the amazing dishes available in the planet.
A Londra il premio della sostenibilità, sia per gli edifici – dal Parco Olimpico al Velodrome, al Main Stadium – che fanno largo uso di materiali riciclati- siae per la gestione dei rifiuti. Tutti gli acquisti all’interno del parco olimpico e tutti gli imballaggi sono riciclabili al 100% mentre l’usa e getta è green e made in Italy.
Nucleic acids are biological molecules essential for known forms of life on Earth. They include DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). Together with proteins, nucleic acids are the most important biological macromolecules; each is found in abundance in all living things, where they function in encoding, transmitting and expressing genetic information. Nucleic acids were discovered by Friedrich Miescher in 1869. Experimental studies of nucleic acids constitute a major part of modern biological and medical research, and form a foundation for genome and forensic science, as well as the biotechnology and pharmaceutical industries. Nucleic Acids Definition :- Every generation shows some resemblance to their ancestors which is because of nucleus of living cell. Nucleus has some bio molecules which can transmit the characteristics from one generation to next one, called as heredity.
Environmental ethics is the part of environmental philosophy which considers extending the traditional boundaries of ethics from solely including humans to including the non-human world. It exerts influence on a large range of disciplines including environmental law, environmental sociology, ecotheology, ecological economics, ecology and environmental geography. There are many ethical decisions that human beings make with respect to the environment. For example: Should we continue to clear cut forests for the sake of human consumption? Should we continue to propagate? Should we continue to make gasoline powered vehicles? hat environmental obligations do we need to keep for future generations? Is it right for humans to knowingly cause the extinction of a species for the convenience of humanity? The academic field of environmental ethics grew up in response to the work of scientists such as Rachel Carson and events such as the first Earth Day in 1970, when environmentalists started urgin
Radiometric dating (often called radioactive dating) is a technique used to date materials such as rocks, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates. It is the principal source of information about the absolute age of rocks and other geological features, including the age of the Earth itself, and can be used to date a wide range of natural and man-made materials. Together with stratigraphic principles, radiometric dating methods are used in geochronology to establish the geological time scale. Among the best-known techniques are radiocarbon dating, potassium-argon dating and uranium-lead dating. By allowing the establishment of geological timescales, it provides a significant source of information about the ages of fossils and the deduced rates of evolutionary change. Radiometric dating is also used to date archaeological materials, including ancient artifacts.